Improvement in metallurgy gas-furnaces



W. C. WHEN.

Metallurgie Gas Furnaces.

Patented July 8,:1873..

Wp'izesses. l fmgz@ WILLIAM c. WREN, 0E BROOKLYN, NEW YORK.

IMPROVEMENT IN METALLURGIC GASFURNAIES Specification forming part ofLetters Patent No.

140,608, dated J nly 8, 1873; application led April 1o, 181s.

To all whom it may concern:

Be itknown that I, WILLIAM C. WREN, of the city of Brooklyn, county ofKings, State of New York, have invented a new and 1m'- proved Method ofHeatin g Smeltinglllurnaces l by the use of Gas;` and I do herebydeclare thattho following is a full and exact descriptionthereof,.reference being had to the accompany-ing drawingsfaud theletters of reference marked thereon.

M y invention relates to the method and manner of heating smelting orother furnaces that require a high degree of heat by gas and air from aforced bla-st. The second part relates to the method of distributing thegas and air over large surfaces in large furnaces.

Figure 1 is a sectional view o t' a furnace with my` attachment inplace. Fig. 2 is a sectional view of the compound blast and gas pipe.

A is the gas-pipe, with the inlet at l). B is the blasbpipe, introducedthrough the bottom of, and into the gas-pipe A, and carried into thepipeA, so that the outlet end ot' the pipe B is four or four and a halfinches short ol' the ontlet'end of the pipe A.

IIa-ving the compound' air and gas pipes made in the manner described,or several of them, if the furnace to be heated requires them, 1 tillthe space with brick, usually occupied by thi; coul, up to 'within sixor eight inches ot' the arch ol" the furnace, it possible, and introducethe pipes.tiiro|1gh the bottom. m the marinier shown, Fig. l. l preti-,rto bring z the pipes from the bottom, so that the flame can play againstthe arch, if possible. The compound pipes can enter from 'the sides, orend, according to circumstances. I connect the blast to the pipe. B insuch a manner that the wind will come from the fan, or other kind ofpower blast, in as direct a line as possible, with the inside wind-pipoB not as long as the outside pipe A, by four inches and a half. I tind,having the wind-pipe B inside the gas pipe, and the distance namedshorter than the gas-pipe, to be the best, and also with a cock on thegas-pipe D, marked E, and a cock ou the wind-pipe B, marked F, toregulate the tiow of both gas and wind in the right proportions. If onecompound pipe is not enough for the width of the furnace, add as manymore compound pipes as may be necessary, each one the counterpart of theother. 1

1.' The compound air and gas pipe herein described, made by arrangingthe air-blast pipe inside the gas pipe, substantially as specified.'

, 2. 'lhc arrangement of the air blast and gas pipes, the former withinand shorter than the latter, and provided with suitable regulatingvalves or cocks, as set forth. y

'WILLIAM O. WREN.

Witnesses:

l. RICHARDSON, H. l5. OULVEu.

